Galvanizing furnace



Nov. 22, 1927.

H. E. GILBERT GALVANIZING FURNACE Filed March 51. 1927 a Sheets-Sheet 1 Harm/E. G/ ber'f INVENTOR.

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QI MIF ATTORNEY Nov. 22, 1927. i

' H. E GILBERT GALVANIZING FURNACE Filed'ma m 51. 1927- s Sheets-Sheet? flurry E. Gilbert v INVENTOR mam A TTORNEY.

Patented Nov. 22, 1927.

UNITED STATES 1,649,824 PATENT OFFICE.

HARRY E. GILBERT, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO HARRY E. GILBERT & SON, OF BRIDGEPOiRT, CONNECTICUT, A CORPORATION OF CONNECTICUT.

GALVANIZING FURNACE.

Application filed March 31, 1927. Serial No. 179,915.

' This invention relates to furnaces, especially the kind used for applying heat to kettles and pots employed for galvanizing and other purposes.

Heretofore, in order to protect kettles and pots used for this work, protective walls of high refractory material have been employed and numerous other means have been devised to lengthen the lives of the kettles. None of these, however, have provcd to be satisfactory, and fuel costs have increased,

rather than decreased. Owing to the in ability of regulating properly the heat surrounding the kettles, the heat treating processes' in industries such as the galvanizing one, could not be controlled satisfactorily, and the industries involved have been greatly retarded in their development.

It is the object of this invention to surmount the aforesaid diiliculties and to'provide a furnace which furnishes a steady, high, and easily controllable, heat to the kettle, in a manner which results in lengthening the life of a kettle about three times, and one which can be operated at approximately one-half the fuel cost.

Broadly, the i ention is a carrying forward of the princi les laid down in Patent #1,4-89,757, granted to me on April 8, 1924 and applying them to the galvanizing industry.

A preferred embodiment of the invention is illustrated by means, the accompany ing drawings in which Fig. 1 is a' plan view of the furnace;

Fig. 2 is a horizontal longitudinal s'cctionalview along the plane of line 22 in Fig. 4;

Fig. 3 is a vertical longitudinal sectional view along the plane of line 33 in Fig. 2; and

Fig. 4 is a vertical cross sectional View along the plane of line l4 in Fig. 2.

Like numbers of reference denote similar parts throughout the several views and the following specification.

10 is a substantially rectangular troughlike kettle. At both sides of the kettle are heating chambers 11. Each heating chamber extends about one-half way the length of the kettle 10 and the greater part of its height. 12 is a combustion chamber forward of the heating chamber of less height than the heating chamber. 13 is a wall of siliceous material of that side of the heattrench.

furnace JIIOI'Q clearly.

ing chamber 11 which is nearest the kettle 10 and runs parallel thereto but in spaced relation therewith, forming anarrow passage 14 between the kettle and the wall. 15 are perforations through the wall 13 connecting the heating chamber 11 with passage 14. An opposite side wall 16 of the chamber 11 is made of refractory material, and so is a top 17 and bottom 18. A rear wall 19 of the heating chamber 11 is located about midway of the kettle and separates a similar chamber in axial alignment with the charm ber 11. The rear wall 19 is made of refractory bricks in stepped pier-like form.

10 and side wall 13 with a duct 24: at its bottom which is joined to a passage 25 at the bottom of the kettle, running forward from its point of connection to the duct 24. This passage is open to the bottom of the kettle and is surrounded at the sides and its bottom with refractory material. Forward of the combustion chamber is arranged a trench 26 at right angles thereto, at both ends of the kettle 10. The passage 25 beyond the kettle 10 is surrounded by Walls, traverses the trench 26 at its bottom, and is connected to a flue 27, suitably insulated and imbedded in the ground forward of the The entire furnace is about halfway above the floor line. The refractory walls of the chamber 11 are covered with silocel, preferably, for insulating purposes, and the outwardly projecting parts above the floor line are covered, preferably, with iron plates. In the trench 26 is arranged an oil or gas burner 29 in line with the mouth 22, and this is fed from a suitable supply pipe 30 controlled by a valve 31, and also entering the burner is an air supply pipe 32, to provide the proper mixture. The trench is provided with a suitable cover 33. The cover 33 has been omitted in .Fig. 1 of the drawing, and the burner parts from Fig.2, in order to disclose the construction of the 34 is a starting vent in the heating chamber 11.

It will be understood that the heatin chamber and fires are arranged at both sides of the kettle, two at each end, the trench at 'each end extending across both fires.

In operation, the burner being lighted,

' 5. flames are directed through the mouth 22 into the combustion chamber 12, from which the heat passes .to the heating chamber 13, through the openings 15 into passage 14: alongside the kettle, and thence through chamber 23 and duct 24 into passage 25 which heats the kettle by radiation, the heat alongside the bottom of the kettle, and then out into the flue 27. In passing through openings 15 in the wall 13 of siliceous material, the same is heated to incahdescence passing through passages 14 and 25 simultaneously heats the kettle by conduction, and the contents of the kettle are heated by convection. Thus I employ the three kinds of transmitting heat, viz, by radiation, by

fire may be used, the principle of operation and the results obtained, being the same as those described above.

I want it especially understood that, while I have shown; the kettle heated by an oil or gas burner, an heating agent may be used, employing eit er gaseous, liquid, or solid fuel, or electric current, as its source of heat,

the burner shown being intended to indicate only one preferred method of applying heat,

as well as its preferred location with respect to the combustion chamber.

Various other modifications in form, proportion and combination of parts may be resorted to without departing from the prin ciples of my invention'as defined in the appended claims.

What I claim as'new, is: v

1. A furnace containing a kettle, a fire alongside of the kettle comprising a heating chamber, a combustion chamber forward of the heating chamber, and a heating agent, a perforated wall of siliceous material between the heating chamber and the kettle, a flue forward of the fire, and passages adjacent the kettle for the travel of heat gases from the fire of the flue.

2. A furnace containing a kettle, a fire alongside of the kettle comprising a heating chamber, a combustion chamber forward of the heating chamber, opening into the heating chamber, and a heating agent arranged I outside the combustion chamber, a perfo rated wall of siliceous material between the heating chamber andthe kettle, and passages between the said wall and kettle and below the kettle adjacent its bottom, for the travel of heat gases from the fire, the said passages being connected to a flue forward of the fire.

3. A furnace containing a kettle, a fire alongside of the kettle comprising a heating chamber, a combustion chamber, and a heating agent, a perforated wall of siliceous material between the heating chamber and the kettle in spaced relation to the side of the kettle, defining a narrow passage in communication with the said heating chamber, a flue forward of the fire, and a duct adjacent the bottom of the'kettle having its one end connected to the rear of the said narrow passage and its other end to the said flue for Elie travel of heat gases from the fire to the ac. Y a

In testimony whereof I have hereunto set my hand.

HARRY E, GILBERT. 

